Garden staff are finding more scale insects and aphids than in past years. A major infestation of lecanium scale was recently found on a large planting of bald cypress at the Garden. The population of ...

My magnolia had a problem with magnolia scale last year. Will it come back, and should I take some action to protect my tree? The leaves were covered in a black mold late last summer. — Frank Butler, ...

Bizarre-looking bugs known as scale insects may be tiny but they can take down an oak tree. Considered pests, the creatures tend to flock to cities where they weaken, and in some cases kill, trees by ...

Q: Everything under one of my large potted plants on the patio is turning black. What isn’t black is sticky. What is wrong with this plant? A: From the pictures you sent me, we know that the black ...

When I spotted a scale insect on a leaf of my Thai lime tree recently, I sighed. It’s only December; sometimes they show up only in March. We must coexist indoors for another five months. I had been ...